Press



Feb..1, 1944. G. MAURER 2,340,607

" v PRESS I Original Filed Dec. 13, 1939 6 Sheets-Sheet 1 AT-TYS.

leb.1,1944. G, MAURE I 2,340,607 PRESS original F'iled Dec. 13, 1939 G'SheetS-Sheet 2 INVENTOR GOTTFRIE'D MAURER ATTYS.

G. MAURER Feb. 1, 1944.

PRESS Original Filed Dec. 13, 1939 6 Sheets-Sheet 5 )NVE'NTQR GOTT FRIED M AUR ER ATTYS.

' Feb 1, 1944. cs. MAURQER 2,340,607

PRESS Original Filed Dec. 13, 1939 6 Sheets-Sheet 5' INVENTOR GOT'TFRIED MAL JRER PRESS Original Filed Dec. 13, 1939 6 Sheets-Sheet v INVENTOR GOTTFRIED MAURER ATTYS: v

Patented Feb. 1, 1944 5.5;:

r OFFICE PRESS Gottfned-Maurer, Zurich, Switzerland, as'signor to A. Miiller & Cie. Maschinenfabrik und Eisena giesserei Aktiengesellschaft, Brugg, Switzerland, a joint-stock company of Switzerland Original application December 13, 1939, Serial Divided and this application September 9, 1940, Serial No. 356,091. In Switzerland November 3, 1939 8 Claims. (Cl. 144-281) This application is a division of application Serial No. 309,099, filed December 13, 1939, now issued as Patent No. 2,271,599, dated February 3, 1942, and, therefore, relates to an apparatus having opposed bars which are caused to grip the goods and to carry them forward and then to release them and to move backward into the outgoing position, and specially to a press in which pressure means are provided allowing a desired pressure to be applied to the goods and in which the bars are arranged on opposed beds whose mutual distance is adjustable in order to adjust the pressure to be applied to the goods by said pressure means. The press is preferably used for working and-dressing articles of wood or similar materials, -e. g., for" pressing and conveying plywood-plates, i. e.,' for subjecting the glued and joined parts of plywood-plates to a pressure suitable for glue-setting. The press may, for instance, also be used as a joining apparatus for veneersand other wood strips as hereinafter set forth.

An object of the invention is to provide driven friction members adapted to engage the bars whereby these latter are, by friction effect, caused to move forward against the eifect of elastic means acting upon the bars and to provide flat portions on the curved surface of said friction members, which, when in juxtaposition g to the bars, release these latter from the friction eifect of said friction members, allowing them to be moved backward by the elastic means. The raising of opposed bars from one another during the backward motion into the outgoing position is avoided. The play between the fiat portions on the curved surface of the friction members and the goods to be pressed and COD-r veyed is sufficient to allow of the backwardmotion of the bars. Therefore, a separate mechanism to enable the bars to move toward and away from one another is omitted.

Another object is to mount one bed of bars on a stationary and the other on a movable frame part to enable the distance'between the beds tobe adjusted and to :provide special means for connecting the frames with each'other. Other objects and features will be apparent as the following description proceeds, reference be ing had to the accompanying drawings in which Figs. 1a and 1b are parts of a side view of an embodiment of the press;

Figs. 2a and 2b are the parts of a horizontal section, taken on line II-H of Figures 1a, 1b; Figs. 3a and 3b are the parts of a section taken online lII+IIIof Figure 16;

Fig. 4 is a side view of a friction member;

Fig. 5 is a perspective representation of said friction member and Fig. 6 is a perspective representation of a further embodiment of the friction member.

The upper bars I10 which, independent of one another, are capable of longitudinal motion, are guided between the double T'-irons I12 by means of the T-irons I 1 I. Play is provided between the irons Ill and I12. The bars I13 of the lower bed, also longitudinally sliding independent of one another, are, in an analogous manner, guided with play between the double T-irons I15 with the help 'of the T-irons I14. The double T-irons I12 and I15 are secured to the U-cross girders I16, I11. The lower girders I11 are supported by U-irons I18 and the latter by double T-cross girders I19 which, in their turn; rest on double T-foundatio'n girders I89 The upper cross girders 116 are mounted on longitudinal U'-beams I8I fixed to the .double T-irons I82. The longitudinal T-beams I83 complete the frame, to which the upper conveying bed is attached. The machine being at work, this frame bears on supports I 85 by the intermediary of springs I84. The supports comprise inside threads engaging threads I81 of spindles I86. The latter pass with allowance for sliding, through the eyes' 240 of the frame of the upper bed. The supports IBEenter, with play, recesses of the irons I82. Bolts 2! I" with nuts 2I2 at their ends, go through the; springs. When the machine is out of 'op'eration, i. e., when no pressure exists, the frame carrying the up per bed is suspended on the supports" I85 with the aid of these bolts. H I

On every two irons I 82 adjacent to each other the bearings I88 for a friction member are mounted. This member is shaped a's'a roller I89. Four supporting .rollers I90, placed on bearings I! of the irons I82, are provided for each friction roller. The friction members I89 act upon the bars I10 of the-upper bed with the pressure necessary for the driving of these barsby friction effect. Similar friction mem bers I92 belong to thelower bed and are carried on bearings I93 of the cross girders I19. These lower members bear against supportingrollers The .curved surface of each friction roller has a flat portion I95 on eachsu-perficies zone co operating with each individual bar. If this flat portion is in juxtaposition to the bar, the latter is released for the backward movement. On the roller shown in Figure5 the flat portion of driving the spindles I 86.

rollers might be of any other kind. They may,

for instance, be displaced from each other, so as to lie along a helical curve, whereby several pitches of the latter may be "provided on the whole length of the roller. Hence, during the enter grooves 225 of the feed rollers, while the 7 other ends of said pieces 22'I enter between two adjacent bars of the beds. The outer pair of friction rollers I89 drives the feed rollers by rotation of the roller, as many bars will be released simultaneously for the backward movement as there are pitches of the helical curve.

drive of each friction roller is as follows:

Worm gear I91 is driven by a driving device,.

not shown, for instance, a motor or a transmission driving shaft, by means of belt pulley I96. The rotation is transmitted, withthe aid of two chains I99, from double chain wheel I98 of the gear wheel shaft to double chain wheel 200 of countershaft I extending over the whole length of the machine. Bevel wheels 202, each driving a pair of friction rollers, are fixed t0 shaft 20I. For this purpose each of these bevel wheels cooperates through bevel wheels 203, 204 of a vertical countershaft 205 with bevel'wheels 206, 201 of the lower or upper friction roller shaft respectively. The bevel wheels 204 are arranged on shafts 205 with allowance for axial sliding, either by means of a square driving head or by means of a slide wedge. All the friction rollers rotate at the same speed. 7

Tension springs 209 act upon each bar of the upper and lower bed. One end of each of these springs is fixed to the webs of section iron pieces 209 each being attached to one of the bars, while the other spring ends are fixed to any parts of the machine frame, e. g. to the stop irons 2I0 described later on. Thus it follows that the tension springs always tend to contract themselves and, thereby, to push the bars to the left. i. e., opposite the direction in which these latter are moved by the rollers I89, I92 respectively.

The stop irons 2I0 fixed to the frame and extending over the whole width'of the beds stop the left hand motion of the bars by the pieces 236, fixed to the bars, striking against them. The cooperating surfaces of the irons H0 and of the pieces 236 are inclined in order to diminish the noise occurring when they knock against each other,

In order to allow the pressure of the beds applied to the goods to be changed, the tension of springs I84 must be adjustable. For this purpose and in order to permit the mutual distance of the beds to be altered, the vertical spindles I86 are adapted to rotate in both directions and are supported on step bearings 228. By the rotation of the spindles either the frame supporting the upper bed is moved upor downwards, or, in case the frame can no longer be moved downwards, the tension of the springs I94 is increased. Hand wheel 2I3 is provided for By this hand wheel and through gear wheels 2 and 2E5 a countershaft 2I6, extending across the machine, is moved. Bevel wheels-2H are keyed-on the ends of shaft 2I6, cooperating with bevel gears ZIB of worm shafts 2l9 extending over the whole length of the machine. Worms 220 secured to as a veneer joining apparatus.

means of chain drives 234 or 24I. By the coupling 235 eitherdrive 234 or drive Hi can be engaged 'Drives 24I impress a circumferential velocity on the feed rollers of a higher amount than the rate of feed of the bars. If the feed rollers are driven by chain gear 24I they work In this case, namely the veneers with the direction of fibres transverse to the feed direction, can be glued together. Owing to this higher circumferential velocity the joints of the veneers arepressed together in a horizontal direction. This veneer joining takes place as follows: In Figs, 1a and 2a. a veneer s is shown, to the edge e of which glue has previously been applied by a device not shown. This veneer s is now inserted, e. g., by hand, between the feed rollers 223 and 224. These rollers now feed the veneer between the bars I19 and I13, between which previously inserted veneers are moving forward. As the circumferential speed of the feed rollers is higher than the speed of the bars and thus of the veneers between the bars, the freshly fed veneer s isplaced with its glued edge e against the edge of the hindmost veneer between the bars, between which bars the veneers are subjected to a suitable pressure and in this way'the veneers are glued together.

The bars of the beds are provided with central bores231 adapted to receive a heating medium necessary, e. g., for the setting of glue on veneers or plywood-plates conveyed'through the press.

The manner of action of this embodiment of the press is as follows:

Friction rollers I89 rotate in a counterclockwise and friction rollers I92 in a clockwise direction.- The bars and the goods clamped between them, e. g., plywood-plates, are moved to the right-by these rollers until the flat portions being in juxtaposition to the bars. In this position the bars have such a play between the fiat portions and goods that they can be returned by springs 208 which, during the right-hand movement of the bar have been loaded. This backward motion is stopped by the irons 2I0 and the pieces 236. In the meantime, the flat portions have left their juxtaposition to the bars and, through friction effect, the latter are again moved to the rightby rollers I89 and I92. If a roller according to Figure 5 is used the bars of each bed are divided into two groups. While one group is pushed back by the springs 208, the other roup, clamping the goods; is moved to the right. In that embodiment, however, where the flat portions are arranged along a helical curve (Fig. 6), only as many bars jerk back simultaneously as there are pitches of the helical line. While these bars are again carried to the right by therollers, the next bar of each pitch returns to the left. Hence it follows that, by a suitable arrangement of the flat portions on the curved surface of the friction members, various motions of the bars of each bed can be chosen at will.

The feed rollers 223, 224, which, by gear'234 are normally driven at a circumferential speed equal to the rate of feed of the bars, seize the goods and carry them to the beds.

By rotating hand wheel M3, the distance corresponding to the thickness of the goods has been given to the beds and the desired pressure has been adjusted. If, for instance, plywoodplates are treated with the press, 1. 'e., if the several glued and joined parts of plywood-plates are to be subjected to a pressure suitable for the setting of the glue, the distance of the bar-beds must be adapted to the thickness of the plywoodplates to be treated, i. e., the distance of the beds must, firstly, be sufficient to make room for the plywood plates and, secondly, of such an amount that the springs I84, by means of the friction members and the bars, exert on the plywood-plates the pressure desired, the amount of which is dependent on the compression of the springs I 84.

From the drawings and the description the exceedingly simple construction of this embodiment may easily be seen, namely, simplesupporting of the bars and an ingenious driving of the latter by means of springs or other elastic means and by friction members. The manufacturing of the latter is, in preferred embodiment, particularly simple and cheap. Only cylindrical rollers have to be turned and th flat portions then milled at the places desired.

While this embodiment of the invention has been illustrated and described in such detail as to enable any one skilled in the art to practise the invention, nevertheless it is to be understood that the invention is not to be limited to any of the details disclosed, but, instead, it will be understood that the invention embraces such embodiments of the broad idea as fall within the scope of the subjoined claims, it being obvious that various changes may be made without departing from the spirit of the invention.

What I claim is:

1. In a press having a frame and two opposed beds of movable bars mounted on said frame and pressing against the article to be treated, driven rotatable members mounted on said frame, said members having a curved surface frictionally engaging said bars to move the latter in one direction, flat portions on said rotatable members to permit movement of said bars in the opposite direction, and elastic means fixed to said bars and to said frame to move said bars in the other direction when said fiat portions come in juxtaposition to said bars.

2. In a press having a frame and two opposed beds of movable bars mounted on said frame and pressing against the article to be treated, driven rotatable members mounted on said frame, said members having a'curved surface frictionally engaging said bars to move the latter in one direction, flat portions on said rotatable members to permit movement of said bars in the opposite direction, elastic means fixed to said bars and to said frame to move said bars in the other direction when said flat portions come in juxtaposition to said bars, and stop means on the frame and bars adapted to limit the bar movement caused by said elastic means.

3. In a press having a frame and two opposed beds of movable bars mounted on said frame and pressing against the article to be treated, means for moving one of said beds toward and away from the other bed in order to adjust the dis tance between said beds, driven rotatable members mounted on said frame, said members having a curved surface frictionally engaging said bars to move the latter in one direction, fiat portions on said rotatable members to permit movement of said bars in the opposite direction, and elastic means fixed to said bars and-to said frame to move said bars in the other direction when said fiat portions come in juxtapositionto said bars.

4. In a press having a frame and two opposed beds of movable bars mounted on said frame and pressing against the article to be treated, means for moving one of said beds toward and away from the other bed in order to adjust the distance between said beds, driven rotatable members mounted on said frame, said members having a curved surface fractionally engaging said bars to move the latter in one direction, flat portions on said rotatable members to permit movement of said bars in the opposite direction, elastic means fixed to said bars and. to said frame to move said bars in the other direction when said fiat portions come in juxtaposition to said bars, and stop means on theframe and bars adapted to limit the bar movement caused by said elastic means.

5. In a press having a frame and two opposed beds of movable bars mounted on said frame and pressing against the article to be treated, driven rotatable rollers mounted on said frame, said rollers having a curved surface frictionally engaging said bars to move the latter in one direction, fiat portions arranged along a helical curve on said rotatable rollers to permit movement of said bars in the opposite direction, springs fixed to saidbars and to said frame to move said bars in the other direction when said flat portions come in juxtaposition to said bars, and stop means on the frame and bars adapted to limit the bar movement caused by said springs.

6. In a press, a frame having a stationary part and a movable part, two opposed beds of movable bars pressing against the article to be treated, one of said beds being mounted on said stationary part and the other bed on said movable part, rotatable threaded spindles connecting said movable part with said stationary part and being capable of moving said movable part toward and away from said stationary part, driven rotatable members mounted on said frame, said members having a curved surface frictionally engaging said bars to move the latter in one direction, fiat portions on said rotatable members to permit movement of said bars in the opposite direction, springs fixed to said bars and to said frame to move said bars in the other direction when said flat portions come in juxtaposition to said bars. and stop means on the frame and bars adapted to limit the bar movement caused by said springs.

7. In a press, a frame having a stationary part and a movable part, two opposed beds of movable I bars pressing against the article to be treated, one of said beds being mounted on said stationary part and the other bed on said movable part, rotatable threaded spindles connecting said movable part with said stationary part and being capable of moving said movable part toward and away from said stationary part, threaded supports engaging said threaded spindles, helical springs adapted to transmit to said supports the pressure applied to said movable part when pressing, driven rotatable members mounted on said frame, said members having a curved surface frictionally engaging said bars to move the latter in one direction, flat portions on said rotatable members to permit movement of said bars in the mwh n; said fla m rtmns. c am? n; s'ws msi. 1 i n t a d bfl f p nd, L01 means; 0 1 Mina nd flap d p ed to imit hai mo emen au e by a isp iings .1. a p ss; mv ngv Hamel ncl W1 pqw beds of movable bars mounted on said frame and pre s n a n h an ic e to b tr a ai iv mtatable members, mounted on sgi d frame, said members havinga curvedsurface frictionally en- 10 against said Stationary members. 

